Plants make food for themselves, using photosynthesis. If you mean what food plants make for us think of fruit and veg. E.g. Carrot, Apple, Peas, Lemon, etc.
Ultimately all food comes from the sun (but you can't get any nutrients yourself from that directly, except for vitamin D).Secondarily all food comes from some kind of green plant that can make sugar directly from sunlight and then use that sugar to make or collect the other main nutrients.Tertiarily some foods come from animals that eat plants and make certain nutrients that plants can't make.Quaternarily some foods come from microbial (fungi and/or bacteria) fermentation of foods from plants or animals.Quintinarily some foods are processed and packaged in factories.Finally you usually purchase food from a store, restaurant, food vendor, etc.
sunlight, water and nutririon from the soil
It has a lot of the foods on which plants thrive, especially nitrogen.
Herbs are plants and most, if not all, produce a flower. Some are quite showy and some are quite small. Some herbal flowers are used to make sachets and to flavor foods.
Many foods comr from plants. Fruits, vegetables, and grain all come from plants.
Photosynthesis
Some chemicals make plants grow. They are called fertilizers. Some chemicals plants make plants die. When intentionally applied, they are the type of pesticide called herbicides. Some chemicals do not affect plants.
It was the other way around. The Europeans got foods/plants from the New World. Potatoes, chocolate, tomatoes, corn are some of the new foods.
Eventualy they will starve to death as all our energy comes from foods produced by plants.
Many animals need to eat plants to live. Other animals eat animals that eat plants. So the food that plants make is the source of life for all animal life.
They can eat meat, seads, plants, and some human foods.
There are many companies specializing in convenience foods. Some of them are Kraft Foods and Batchelors, who make mainly savoury foods, Kelloggs who make breakfast foods and Sara Lee who make cakes and desserts.